Sainfoin (Onobrychis viciifolia)

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Sunlight Full sun to partial shade; thrives in exposed, dry sites and tolerates light shade in hot climates

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Watering Water deeply but infrequently; drought-tolerant once established, avoid overwatering to prevent root rot

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Temperature Hardy to -20°C; withstands hot, dry summers in temperate regions and survives mild winter frost

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Leaf: Pinnately compound leaves with 5–15 oval leaflets, gray-green and slightly hairy
Flower: Dense racemes of pink to purple pea-like blooms, faintly fragrant
Stem: Erect, slender, branching stems covered in fine, soft hairs

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Watering

Keep soil moderately moist during active growth periods

Fertilization

Light topdressing of balanced compost. Avoid high-nitrogen fertilizers, as legumes fix their own nitrogen

Eggshell powder topdress：Crush clean, dried eggshells to fine powder; sprinkle lightly on soil surface to add calcium without burning sensitive roots

Pruning

Deadhead spent flower racemes to encourage extended blooming and prevent self-seeding
Cut back stems to 5 cm above soil after flowering to promote healthy regrowth for the next season
Remove damaged or diseased stems in early spring to improve airflow

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no known adverse effects from ingestion

Humans: Non-toxic to humans; safe for consumption in small amounts as a forage crop

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Culture: N/A

Usage: Forage crop for livestock, pollinator-friendly ornamental, and soil erosion control plant